make-bcache (8)

NAME

make-bcache - create a cache device

SYNOPSIS

make-bcache [ -U UUID ] [ -b bucket-size ] device

OPTIONS

-C

Create a cache

-B

Create a backing device (kernel functionality not yet implemented)

-U UUID

Create a cache device with the specified UUID

-b bucket-size

Specifies the bucket size. Allocation is done in terms of buckets, and cache hits are counted per bucket; thus a smaller bucket size will give better cache utilization, but poorer write performance. The bucket size is intended to be equal to the size of your SSD's erase blocks, which seems to be 128k-512k for most SSDs. Must be a power of two; accepts human readable units. Defaults to 128k.